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RE: Execution problem : getinterfaces: Failed to open ethernet in terface (fxp9)
From: Dom Devitto <Dom.Devitto () ntl com>
Date: Sat, 7 Jan 2006 23:49:48 -0000

Hmmm,

I've done some more digging.

 

This seems to have come in at version 3.90 - I guess part of all the frame
transmission changes.

(Using --send_eth or send_ip doesn't make any difference)

 

BINGO, got it:

"getinterfaces: Failed to open ethernet interface"

really means - for 'clean' OpenBSD 3.8 at least:

"You need more BPF devices, rebuild your kernel, and remake /dev, possibly
changing MAKEDEV"

 

Alternatively, using "ifconfig <interface> delete" to delete some interfaces
seems to work too.

 

TTFN,

Dom
Dom De Vitto  CISSP MBCS BSc        Desk: 01962 82 3363 / 716 3363
Security Consultant                 Mobile: 07855 805 271
Operational Security                <mailto:Dom.DeVitto () ntl com
<mailto:Dom.DeVitto () ntl com> >

  _____  

From: Dom Devitto 
Sent: 01 January 2006 13:20
To: 'fyodor () insecure org'
Subject: Execution problem : getinterfaces: Failed to open ethernet
interface (fxp9)

 

Hi Fyodor,

Just rebuilt my home firewall, running OpenBSD 3.8, and hit a problem with
both 3.95 and 3.96BETA2.

(the former built both stand-alone and via the OpenBSD ports process)

 

The problem:

./nmap -sS -p 80 217.169.21.114 (for example, but it doesn't matter)

Starting Nmap 3.96BETA2 ( http://www.insecure.org/nmap/ ) at 2006-01-01
10:19 GMT

getinterfaces: Failed to open ethernet interface (fxp9)

QUITTING!       

 

This box has, interestingly, 16 (real) fastethernet network interfaces
(fxp0-fxp15), plus a loopback.

This all works fine with nmap 3.81, but I realise that's pretty ancient....

Dom
Dom De Vitto  CISSP MBCS BSc        Desk: 01962 82 3363 / 716 3363
Security Consultant                 Mobile: 07855 805 271
Operational Security                <mailto:Dom.DeVitto () ntl com
<mailto:Dom.DeVitto () ntl com> >

 



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